BASIC AND DRYING SHRINKAGE OF INFRASTRUCTURE CONCRETES WITH VARIABLE FLY ASH CONTENT

Author(s): Anja E. Klausen, Gunrid Kjellmark, Terje Kanstad
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-171-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 589-598
Total Pages: 10
Language : English

Abstract: Studies on basic (autogenous) and drying shrinkage of infrastructure concretes with variable
fly ash (FA) content have been undertaken and three different test systems have been used:
(1) A simple standard test method for measurement of isothermal basic shrinkage and drying
shrinkage, (2) The Dilation Rig which is a dummy rig following the Temperature-Stress
Testing Machine (TSTM) and (3) The Free Deformation (FD) system which consists of
several rigs of similar type as the Dilation Rig. Concretes with w/b = 0.4 and FA content in
the range 0 – 33 % by total binder weight have been investigated. The experimental results
show that basic shrinkage decreases with increasing FA content, while drying shrinkage is
increasing with the FA content. The results are compared to the Code-type models included in
the present version of Eurocode 2 and fib Model Code 2010, which both only indirectly
account for the effect of FA through the influence of the FA content on the compressive
strength. The two models give quite similar results, and the general observation is that the
effect of FA is reasonably well predicted. In general, however, basic shrinkage is
underestimated by the models, while drying shrinkage is overestimated.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00